<style>
* {
    margin: 0;
    padding: 0;
}

.clearfix {
    content: '';
    display: block;
    clear: both;
}

#jingao {
    width: 200px;
    height: 50px;
    position: absolute;
    left: 45%;
    top: 40px;
    background-color: rgba(22, 5, 175, 0.267);
}

#Navigation {
    position: relative;
    width: 100%;
}

#house1 {
    display: inline-block;
    position: absolute;
    left: 5px;
    top: 17px;
}

#guanli {
    text-decoration: none;
    height: 50px;
    line-height: 50px;
    margin-left: 20px;
    font-size: 18px;
    color: #777;
}

#nav {
    background-color: rgba(22, 5, 175, 0.267);
}

.leftdaohuang {
    margin-left: 20px;
    float: left;

}

.leftdaohuang a {
    text-decoration: none;
    list-style: none;
    width: 150px;
    height: 50px;
    line-height: 50px;
    display: block;
    color: black;
}

.leftdaohuang a:hover {
    color: #fff;
    background-color: rgba(22, 5, 175, 0.267);
}

.leftdaohuang a span {
    display: inline-block;
    margin: 0 20px;

}

.xialacai {

    margin-right: 100px;
    float: right;
}

.but {
    color: #fff;
    background-color: rgba(22, 5, 175, 0.267);
}

.daohuang2 .span1 {
    margin-left: 50px;
    display: inline-block;
    width: 80px;
    height: 20px;
    color: #fff;
    margin-top: 20px;
    background-color: rgba(22, 5, 175, 0.267);
}

.box {
    width: 500px;
}

.span3 {
    margin-top: 10px;
    margin-right: 50px;
    float: right;
    width: 1300px;
    border-bottom: 2px solid #000;
    background-color: rgba(22, 5, 175, 0.267);
}

</style>